CLC-1090 - Assignments & Tasks: Content is not centered in the column
https://jira.media.berkeley.edu/jira/browse/CLC-1090

Also fixes:

* Unscheduled isn't showing up on the same height as Scheduled
Merge pull request #573 from christianv/CLC-1090

CLC-1090 - Assignments & Tasks: Content is not centered in the column